val of_string : string -> t
val compare : t -> t -> int
val to_string : t -> string
val print : Stdlib.Format.formatter -> t -> unit
val set_var_operations : unit -> unit
val pp : Stdlib.Format.formatter -> t -> unit
include sig ... end
val pretty : unit -> t -> Printable.Pretty.doc
val printXml : 'a BatInnerIO.output -> t -> unit
val to_yojson : t -> [> `String of string ]
val equal : {Var}3.t -> {Var}3.t -> bool